Jonathan yebkes



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Diesfor Forming Hammers. N0.. 142,070. y Patented August19,1873.

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UNITED STATES ATENT OFFICEo JONATHAN YERKES, OF PHILADELPHIA,PENNSYLVANIA, ASSIGNOR TO YERKES & PLUMB, `OF SAME PLAGE.

IMPROVEMENT IN DIES FOR FORMING HAMMERS., i

Specification forming part of Letters Patent No. 142,070, dated August19, 1873; application filedA July 18, 1873.

To all whom it may concern:

Be it known that I, JONATHAN YERKEs, of the city and county ofPhiladelphia and State of Pennsylvania, have vinvented a new and usefulImprovement in the Manufacture of Hammers; and l dohereby declare thefollowing to be a clear and exact description of the nature thereof,sufficient to enable others skilled in the art to which my inventionappertains to fully understand, make, and use the same, reference beinghad to the accompanying drawings making part of this specilication, inwhich` Figure lis a central longitudinal vertical section of the diesembodying my invention. Fig. 2 is an end view thereof. Fig. 3 is a viewofthe inner face of one of the dies. Fig. 4 is a top view of a hammerpartly finished. Fig. 5 is a top view of a finished hammer.

This invention consists in dies adapted for the manufacture ofdoubleheaded hammers, whereby a superior article will be produced atless expense` than by means heretofore ein ployed.

Referring to the drawings, A A represent the two parts or sections ofthe die. The workin g-face of each section is formed with acavity, B,corresponding to the portion O of the hammer, surrounding its eye D witha cavity, E, corresponding to one head, F, of the hammer and with acavity, G, correspondingto the The cavity E is separated from the cavityB by a ridge, J, and the cavity G from the cavity B by a ridge, K. Theridge J is adapted to work down and form the neck L of the hammerbetween the head F and eye portion O. The ridge K is adapted to workdown and form the neck M of' the hammer between the eye portion C andhead H. One section of the die will be properly secured to a plunger, towhich reciprocating motion is imparted in any well-known manner, andthe` other section is fixed to a suitable bed, the two sections beingarranged that the depressions will be coincident.

The operation is as follows: The bar of metal to be worked intohammer-heads is properly punched for the eye portion of the head, andthe eye thus punched is occupied by a pin or filling for preventing theclosing ot' the eye. The bar is now laid sidewise on the lower orstationary die and power communicated to the plunger to which the otheror upper die is secured. The metal or stock will be worked into thevarious depressions in the faces of the dies and worked down at theportions corresponding to the necks L Mand by turning or rotating thebar when the upper plunger is elevated the metal will gradually assumethe form or contour of the depressions and be worked down by the ridgesJ K.

The pin or filling in the eye portion of the metal, as aforesaid, is nowremoved, and the hammer-head as formed is in condition for grinding,polishing", and finishing.

Having thus described my invention, What I claim as new, and desire tosecure bygLetters Patent, is-

The dies A .A for the manufacture of hammers, constructed and operatingas herein set forth. Y

JONATHAN YERKES.

Witnesses I JOHN A. WrEnERsHEiM, vMILLARD F. WALTON.

